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Finding the Fourth Proportional to 526.76, 793.20 and 390.76

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Solution

The fourth proportional to 526.76, 793.20 and 390.76 is: 588.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.76 : 793.20 = 390.76 : x
  2. Step 2: Convert to fraction form
    526.76/793.20 = 390.76/x
  3. Step 3: Cross multiply
    526.76x = 793.20 × 390.76
  4. Step 4: Simplify right side
    526.76x = 309,950.83
  5. Step 5: Solve for x
    x = 309,950.83/526.76
  6. Step 6: Final answer
    x = 588.41

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.